package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.Combo1Mapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServicelmpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private Combo1Mapper combo1Mapper;

    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        //判断当前加入到购物车的商品是否以及存在
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list!=null&&list.size()>0){
            //如果存在了，只需将数量加一
            ShoppingCart Cart = list.get(0);
            Cart.setNumber(Cart.getNumber()+1);
            shoppingCartMapper.UpdateNumberById(Cart);
        }else {
            //不存在，需要插入一条购物车数据
            Long dishId = shoppingCartDTO.getDishId();
            if(dishId!=null){
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());

            }else {
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = combo1Mapper.getById(setmealId);

                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());

            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());

            shoppingCartMapper.insert(shoppingCart);
        }
    }


    /**
     * 查看购物车
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        Long currentId = BaseContext.getCurrentId(); //获取当前用户的id
        ShoppingCart build = ShoppingCart.builder()
                .userId(currentId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(build);


        return list;
    }


    /**
     * 清空
     */
    @Override
    public void delete() {
        Long currentId = BaseContext.getCurrentId(); //获取当前用户的id
        shoppingCartMapper.delete(currentId);
    }
}
